community/netatalk: add mysql cnid backend
Currently only tdb and last (tdb in-memmory) are supported. Both are sub-optimal according to http://netatalk.sourceforge.net/3.1/htmldocs/configuration.html#CNID-backends
Related to #12416
Currently only tdb and last (tdb in-memmory) are supported. Both are sub-optimal according to http://netatalk.sourceforge.net/3.1/htmldocs/configuration.html#CNID-backends
Related to #12416